PAI多少钱一公斤？
这个问题一搜，从两百块一公斤到五百块一公斤，报价差得比酰亚胺含量还多。有人说我买的两百的国产通用用得挺好，有人说我买的五百的进口高端才叫高耐热。到底差在哪？
说实话，问PAI多少钱一公斤的人，大概率还没搞懂PAI这东西不是一个料——通用级、高耐热级、玻纤增强级、碳纤维增强级、耐磨级，每个分支价格都不一样。你拿通用级的价和碳纤维增强比，那不叫比价，叫被忽悠。
PAI就是聚酰胺酰亚胺，分子链中同时含有酰胺键和酰亚胺键，超高耐热、高强度、耐磨，常用于航空航天、汽车发动机周边、电子电器、工业机械、医疗器械。
一、主流牌号报价（外企+中企）
先把市面上走量的牌号和参考价摆出来。以下为近期市场参考价，实时价格以当日询价为准。
进口PAI（外企大厂）
通用级，参考价约300-420元/公斤。航空航天、汽车发动机周边、电子电器。
高耐热级，参考价约350-480元/公斤。工业机械、结构件、高温应用。
碳纤维增强级，参考价约400-500元/公斤。高端结构件、导电应用、航空航天。
国产PAI（中企大厂）
通用级，参考价约200-320元/公斤。性价比高，航空航天、汽车发动机周边、电子电器。
高耐热级，参考价约230-380元/公斤。工业机械、结构件、高温应用。
玻纤增强级，参考价约260-420元/公斤。结构件、汽车、工业机械。
一句话总结：国产通用200-320块，国产高耐热/玻纤增强230-420块，进口通用300-420块，进口高耐热/碳纤维增强350-500块。你要的是啥酰亚胺含量和性能，决定了你该在哪一档选。
二、同是PAI，价差凭什么这么大
PAI的价格差，主要藏在四个地方。
第一，酰亚胺含量不同。低酰亚胺便宜，高酰亚胺贵。酰亚胺含量越高，耐热性和强度越好，但加工难度越大。
第二，耐热等级不同。通用级便宜，高耐热级贵。高耐热需要特殊配方，价格更高。
第三，增强方式不同。无筋通用便宜，玻纤增强适中，碳纤维增强贵。碳纤维增强比玻纤增强贵30-50%。
第四，品牌和产地。进口溢价高但批次稳定，国产性价比高但牌号少。同样是高耐热级，进口比国产贵30-50%，贵的是品控和研发。
三、采购避坑：别让酰亚胺含量骗了你
我见过太多采购，比价比到最后选了最便宜的两百的，然后做出来的制品耐热差、变形、客户退货，一次损失够买半年的好料。
PAI采购这行，水比你想的深。三个坑必须绕开：
第一，看热变形温度和长期使用温度不看牌号。同一个牌号不同批次性能可能波动，拿到料先测热变形温度和长期使用温度，和COA对得上再用。别听销售说"差不多"，差不多就是差很多。
第二，警惕以次充好。有些贸易商拿PEI当PAI卖，拿低酰亚胺当高酰亚胺卖。要COA、要酰亚胺含量检测、要原厂包装，三证合一才敢用。
第三，别只比单价，算综合成本。A料单价200块，做出来制品次品率5%；B料单价320块，次品率1%。算到每件制品上，B料反而更便宜。
四、标准牌号满足不了？看看改性方案
如果你发现标准牌号怎么选都差点意思——比如要高耐热又要易加工、要玻纤增强又要高流动、要低成本又要碳纤维增强——那不是PAI的问题，是你需要的不是标准PAI，是改性PAI。
这时候可以看看宁波科隆新材目前在做的高性能改性PAI方案，玻纤增强、阻燃、耐候、导电这些方向都有对应牌号在做。有特殊需求的可以私信要一份改性PAI的报价参考，比自己买基料再加助剂调试，省的不只是钱，还有试错的时间。
说白了，标准料是大锅饭，改性料是定制菜。你的制品要求越高，越需要定制。
五、常用牌号，私信给你当日报价
上面的价格都是参考价，PAI行情一天一个样，偏苯三酸酐、二胺、酰亚胺化试剂、玻纤、碳纤维、汇率都在动。
如果你需要进口、国产这些品牌的具体牌号当日报价，私信我，发你一份实时价格表。不绕弯子，报实数。
写在最后
买PAI这事儿，两百的和五百的，差的不是三百。
单价是门槛，选对酰亚胺含量和性能才是底线。别让报价单上的数字迷惑了你——你买的不是一公斤塑料，是一公斤能做出超高耐热航空部件的方案。把账算到每件制品上，再加上次品退货损失，你才知道谁真便宜谁真贵。
你在PAI采购上踩过什么坑？是耐热差还是变形？评论区聊聊，点赞最高的三位，送一份PAI主流牌号选型对照表。
PAI和PEI有什么区别
PAI酰亚胺含量怎么选
PAI和PI有什么区别
PAI改性料厂家怎么选
PAI注塑常见问题及解决
How much is PAI per kilogram?
PAI is not one material: high-heat, GF-reinforced, wear-resistant, and each carries a different price.
1. Mainstream grade quotes (imported + domestic) — recent market references; live prices subject to same-day inquiry.
Imported PAI
general-purpose, approx. CNY 300-420/kg. aerospace; engine compartments; electronics.
high-heat, approx. CNY 350-480/kg. industrial machinery; structural parts.
approx. CNY 400-500/kg. aerospace.
Domestic PAI
general-purpose, approx. CNY 200-320/kg. aerospace; engine compartments; electronics.
high-heat, approx. CNY 230-380/kg. industrial machinery; structural parts.
GF-reinforced, approx. CNY 260-420/kg. structural parts; automotive; industrial machinery.
2. Why prices differ so much
Four factors: (1) composition — lower levels are cheaper; higher levels give better performance but cost more. (2) heat grade — premium grades need special formulations and cost more. (3) reinforcement — special applications need special formulations or certification and cost more. (4) Brand and origin — imports carry a premium but offer batch stability; for the same grade, imports cost 30-50% more than domestic, paying for quality control and R&D.
3. Procurement pitfalls
The cheapest material often fails on performance and triggers customer returns. Three traps to avoid:
First, test heat deflection temperature and long-term service temperature against the COA instead of trusting the grade name — performance of the same grade can fluctuate between batches. Second, watch out for substitution fraud: some traders pass off cheaper or recycled material as the real thing; demand the COA, a test report and original packaging before use. Third, don't compare unit price alone — calculate total cost per finished part, including rejected-goods loss; a higher-priced grade with a 1% defect rate is often cheaper than a low-priced one with 5% rejects.
4. Standard grades not enough? Consider modified compounds
If standard grades always fall short — for example you need flame retardancy AND high transparency, reinforcement AND chemical resistance, or low cost AND food grade — you don't need standard PAI, you need a modified compound. Ningbo Kolong New Materials is developing high-performance modified PAI solutions covering glass-fiber reinforcement, flame retardancy, weatherability and conductivity. Message us for a modified PAI quote reference — it saves not only money but also trial-and-error time.
In plain terms: standard grades are a big pot of shared rice; modified compounds are a dish cooked to order. The higher your requirements, the more you need customization.
5. Popular grades — same-day quotes via message
All prices above are references; PAI prices change daily as feedstocks and exchange rates move. If you need same-day quotes for specific grades, message us and we will send a live price sheet. No beating around the bush — real numbers.
Final words
Unit price is the threshold; choosing the right grade and performance is the baseline. Do the math per finished part, add rejected-goods loss, and you will know who is truly cheap and who is truly expensive.
What pitfalls have you hit when buying this material? The three most-liked comments will receive a grade selection guide.
